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IAD to PSS: distance & flight time
Washington (Washington Dulles International Airport) → Posadas (Libertador Gral D Jose De San Martin Airport)
4,788 mi
7,706 km · 4,161 nm
9h 51m
estimated nonstop flight time
+1h
time difference · heading south
See live IAD→PSS fares Phone-only fares on this route — call free
Flight time details
4,788 miles nonstop takes roughly 9h 51m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- PSS — Libertador Gral D Jose De San Martin Airport · Posadas, Argentina
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAD
Near PSS
- ENO · Encarnación Airport14 mi away
- AYO · Juan De Ayolas Airport54 mi away
- SRA · Santa Rosa Airport96 mi away
- ELO · El Dorado Airport110 mi away
Frequently asked questions
How far is IAD from PSS?
The flight distance from Washington (IAD) to Posadas (PSS) is 4,788 miles (7,706 km, 4,161 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to PSS?
A nonstop flight takes about 9h 51m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Washington and Posadas?
Posadas is 1 hour ahead of Washington.
What is the cheapest way to fly from IAD to PSS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–PSS that never appear on search engines, with no booking fees.